Mark wilder



'UNITED STATES P kTENT CFTICIIL MARK NVILDER OF PETERBOROUGH, NEWYHAMPSHIRE.

MACHINERY FOR CUTTING PAPER.

Specification of Letters Patent No. 5,672, dated July 18, 1848.

T0 all whom may concern:

Be it known that I, MARK VILDER, of Peterborough,in the county ofHillsborough and State of New Hampshire, have invented a new and usefulImprovement in the M anner of Constructing Apparatus for Cutting Paperinto Sheets, as it is Delivered from the Cylinder or other Machine inwhich it 1s Manufactured in Continuous Lengths; and I do hereby declarethat the following is a full and exact description thereof. v

In the accompanying drawing Figure l, is a perspective representation ofmy improved sheet cutting apparatus, which in its general constructionand operation, resembles such as have been before used.

A, A, is a reel which is made to revolve with the appropriate speed bymeans of a whirl and band, or otherwise. This reel must be of suchlength as is required by the width of the paper that is made on themachine to which it is to be attached. In the place of one of its roundsit carries a bar B, of wood or metal that has attached to it bysuit-able screw bolts, or otherwise, a cutting knife, or shear blade a,a, and to another bar of wood or metal, constituting a part of theframe, and shown at C, C, is attached a stationary knife, or shear bladeZ), against which the revolving knife a, a, is to operate, so as to cutthe paper as it passes between them. Cutting knives, or shear blades,resembling mine in so far as that one of them is stationary, and theother made to revolve, have been used for cutting paper, but the bladeshave been so placed as to allow them in the act of cutting to operatewith their thin edges presented to each other, and not their flat sidesas under my arrangement; they have in this case rather bruised than cutthe paper apart; their edges when so used are easily injured; they havenot the desired stability, and they can not be conveniently made toyield, as one of them is made to do under my arrangement in which theplane of the knife a, a, coincides with the periphery of the reel, andthe knife I), lies flatwise against the underside of the bar C, C.

In using the machine as ordinarily constructed with the knife a, a, andthe bar B,

unyieldingly attached to the reel,'it has not been found possible tocause the knives to cut the paper accurately, without their requiringfrequent adjustment; while they are also liable to act injuriously uponeach others cutting edges. My improvement is intended to obviate thesedifficulties, and consists in the following arrangement: In the firstplace, as above indicated, I make the knife Z), b, stationary, placingits flat side againstthe underside of the bar C, C; and the` flat sideof the knifea, a. I place on the outer face of the bar B, B, which barand knife I render yielding in the following manner. To each of the reelheads A, A, is firmly attached a bracket, or projecting piece D, D',which brackets are to sustain the bar B, and its knife a, a, in suchmanner as that said bar and knife shall be capable of receding, t0 ashort distance, when the cutting edge of said knife is brought intocontact with the cutting edge of the stationary knife Z), The manner ofeffecting this will be best seen in Fig. 2, which is a cross section ofthe reel, and of the bar C, C, just within the end of the bracket D, asseen when looking toward the head A. Through the bar B, and through thebracket D, at each end of said bar, there passes a screw bolt, having onits inner end an adjusting nut c; and between these brackets and the barthere is a spiral or other spring c, e, that forces said bar and itsknife out, and allows it to yield inward as it is broght into contactwit-h the stationary knife. To the end of the bar B, and beyond the endof the cutting knife, is affixed a friction roller d; and at the end ofthe bar C, C. There is an adjustable guide piece f, which is attached tothe bar by means of a bolt and screw nut g the lower side of this guidepiece is flat so as to adapt it to the action of the roller d, and thispiece may be readily so adjusted as to conduct the edge of the knife a.,under, and in contact with that of the stationary knife Z). The cuttingedges of the two knives are not precisely parallel as they are broughtinto Contact with each other, that end of the knife a, that has theroller attached to it entering first under the knife b, and the yieldingof the former, by means of the springs, keeps the two edges in contactand causes their cutting action to be perfect.

It will be manifest that the bar C, C, and its knife Z), b, may be madethe yielding bar and knife, and that the bar B, and its knife a, a, maybe permanently attached to the reel, producing, under this arrangement,an effect the same with that above described,

other in the act of cutting, in combination With the apparatus hereindescribed by Which the yielding knife is borne up against 15 thestationary knife and its action thereon regulated by the aid of afriction roller and of an adjuableI guide piece, substantially in thenianner, and for the purpose herein fully inade known.

MARK WILDER. Vitnesses:

THos. P. JONES, Wu. J. DoNoHoo.

